Difference between revisions of "231.8 Bridge Width"

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m (Removed inaccurate design information concerning shoulder requirements)
(Per BR, revision coordinated with Green Book guidance that clear bridge width shall be the same as the approach roadway for collectors, arterials and freeways.)
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Bridge width will vary based on project scope, context of surrounding road and future plans for the route.  Project scope and bridge economics usually determine the treatment strategy for individual projects.  Treatment strategies range from rehabilitation to rehabilitation and widening to complete replacement.
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Bridge width, exclusive of sidewalks, shall be equivalent to the existing or, if wider, proposed approach roadway (i.e., traveled way and any shoulders) width.  In the absence of shoulders, the bridge width shall be 4 ft. (2 ft. per side) wider than the approach traveled way width.  Greater bridge widths may be considered if future expansion of the facility will occur within the first half of the expected life of the bridge improvement, shared-use lanes will be constructed immediately adjacent to the roadway, or to facilitate construction.  
  
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'''Major Roads'''
 
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The desirable width of bridges on Major roads includes the traveled lanes and shoulders.  The minimum width of bridges for Major roads is 24 ft., that is, there could be situations where an existing bridge may be rehabilitated and used in place even though it may not be the desirable width.
 
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'''Minor Roads'''
 
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The desirable minimum width of bridges on Minor roads includes the traveled lanes and 2 ft. shoulders.  For routes with 10 ft. lanes, the bridge width to strive for is 24 ft. and for routes with 12 ft. lanes, the desirable width is 28 ft.
 
  
 
[[category:231 Typical Section Elements for Roadways|231.08]]
 
[[category:231 Typical Section Elements for Roadways|231.08]]

Revision as of 12:18, 13 August 2018

Bridge width, exclusive of sidewalks, shall be equivalent to the existing or, if wider, proposed approach roadway (i.e., traveled way and any shoulders) width. In the absence of shoulders, the bridge width shall be 4 ft. (2 ft. per side) wider than the approach traveled way width. Greater bridge widths may be considered if future expansion of the facility will occur within the first half of the expected life of the bridge improvement, shared-use lanes will be constructed immediately adjacent to the roadway, or to facilitate construction.

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